/**
 * Licensed to the Apache Software Foundation (ASF) under one
 * or more contributor license agreements.  See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership.  The ASF licenses this file
 * to you under the Apache License, Version 2.0 (the
 * "License"); you may not use this file except in compliance
 * with the License.  You may obtain a copy of the License at
 *
 *   http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing,
 * software distributed under the License is distributed on an
 * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
 * KIND, either express or implied.  See the License for the
 * specific language governing permissions and limitations
 * under the License.
 */
package org.apache.pinot.server.api.resources;

import com.fasterxml.jackson.core.JsonProcessingException;
import javax.ws.rs.WebApplicationException;
import javax.ws.rs.core.MediaType;
import javax.ws.rs.core.Response;
import javax.ws.rs.ext.ExceptionMapper;
import javax.ws.rs.ext.Provider;
import org.apache.pinot.spi.utils.JsonUtils;


@Provider
public class DefaultExceptionMapper implements ExceptionMapper<WebApplicationException> {

  @Override
  public Response toResponse(final WebApplicationException exception) {
    Response.ResponseBuilder builder =
        Response.status(exception.getResponse().getStatus()).entity(toJson(exception)).type(MediaType.APPLICATION_JSON);
    return builder.build();
  }

  private String toJson(final WebApplicationException exception) {
    ErrorInfo errorInfo = new ErrorInfo(exception);

    // difference between try and catch block is that
    // ErrorInfo can contain more information that just message
    try {
      return JsonUtils.objectToString(errorInfo);
    } catch (JsonProcessingException e) {
      return "{\"message\":\"Error converting error message: " + e.getMessage() + " to string\"}";
    }
  }
}
